Wash the cauliflower head and remove any green leaves. Cut it into bite-sized florets. Dry the florets thoroughly to ensure they roast well.

Place the cauliflower florets in a mixing bowl. Drizzle them with olive oil, ensuring all pieces are lightly coated. Season with salt and pepper. Optionally, add other seasonings like garlic powder and paprika for extra flavor.

Attach the air fryer lid to your Instant Pot and preheat it according to the manufacturer's instructions. Preheating is essential for achieving a crispy texture.

Place the seasoned cauliflower florets in the preheated air fryer basket. Ensure they are in a single layer without overcrowding.

Set the air fryer temperature to around 375°F (190°C) and the timer for approximately 15-20 minutes. The exact time may vary based on the size and thickness of your cauliflower florets. Be sure to shake or toss the florets halfway through to ensure even cooking.

The cauliflower is done when it's tender and golden brown on the outside. You can test for doneness by inserting a fork or toothpick; it should go through easily.

If desired, sprinkle grated Parmesan cheese over the roasted cauliflower during the last few minutes of cooking. This will create a delicious cheesy crust.

Remove the roasted cauliflower from the air fryer basket and transfer it to a serving dish. Garnish with fresh herbs, if desired.

Serve your Instant Pot Air Fryer Roasted Cauliflower immediately while it's hot and crispy. It makes a fantastic side dish or snack.